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Title: New 5K Magnetic Rare Earth Regenerator Intermetallic Compounds

Abstract

No abstract prepared.

Authors:
; ; ;
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA
Sponsoring Org.:
USDOE Office of Science and Technology (OST) - (EM-50)
OSTI Identifier:
887159
Report Number(s):
IS-J 7053
Journal ID: ISSN 0065-2482; ACYEAC; TRN: US200617%%578
DOE Contract Number:
W-7405-Eng-82
Resource Type:
Journal Article
Resource Relation:
Journal Name: Advances in Cryogenic Engineering; Journal Volume: 52
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; INTERMETALLIC COMPOUNDS; RARE EARTHS; REGENERATORS

Citation Formats

K.A. Gschneidner, Jr., A.O. Tsokol, Lucas Hale, and V.K. Pecharsky. New 5K Magnetic Rare Earth Regenerator Intermetallic Compounds. United States: N. p., 2006. Web.
K.A. Gschneidner, Jr., A.O. Tsokol, Lucas Hale, & V.K. Pecharsky. New 5K Magnetic Rare Earth Regenerator Intermetallic Compounds. United States.
K.A. Gschneidner, Jr., A.O. Tsokol, Lucas Hale, and V.K. Pecharsky. Wed . "New 5K Magnetic Rare Earth Regenerator Intermetallic Compounds". United States. doi:.
@article{osti_887159,
title = {New 5K Magnetic Rare Earth Regenerator Intermetallic Compounds},
author = {K.A. Gschneidner, Jr. and A.O. Tsokol and Lucas Hale and V.K. Pecharsky},
abstractNote = {No abstract prepared.},
doi = {},
journal = {Advances in Cryogenic Engineering},
number = ,
volume = 52,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2006},
month = {Wed Mar 01 00:00:00 EST 2006}
}
  • The concentration dependence of the crystal lattice parameters, of the magnetic transition temperatures, of the molecular magnetic moment, of the effective magnetic anisotropy constant, and of the hysteretic magnetic properties is investigated for single crystals of the rare-earth intermetallic compounds (Tb/sub 1-x/Y/sub x/)/sub 3/Co (0< or =x< or =1), in which the effective magnetic anisotropy field is comparable with or larger than the effective exchange-interaction field. A qualitative explanation of the observed regularities is given. Magnetically hard single crystals, with a gigantic value of the maximum energy product (up to 100 million G-Oe), are obtained.
  • Here, we report the fabrication of a set of new rare-earth-free magnetic compounds, which form the Fe 3Co 3Ti 2-type hexagonal structure with P-6m2 symmetry. Neutron powder diffraction shows a significant Fe/Co anti-site mixing in the Fe 3Co 3Ti 2 structure, which has a strong effect on the magnetocrystalline anisotropy as revealed by first-principle calculations. Increasing substitution of Fe atoms for Co in the Fe 3Co 3Ti 2 lattice leads to the formation of Fe 4Co 2Ti 2, Fe 5CoTi, and Fe 6Ti 2 with significantly improved permanent-magnet properties. A high magnetic anisotropy (13.0 Mergs/cm 3) and saturation magnetic polarizationmore » (11.4 kG) are achieved at 10 K by altering the atomic arrangements and decreasing Fe/Co occupancy disorder.« less
  • Here, we report the fabrication of a set of new rare-earth-free magnetic compounds, which form the Fe 3Co 3Ti 2-type hexagonal structure with P-6m2 symmetry. Neutron powder diffraction shows a significant Fe/Co anti-site mixing in the Fe 3Co 3Ti 2 structure, which has a strong effect on the magnetocrystalline anisotropy as revealed by first-principle calculations. Increasing substitution of Fe atoms for Co in the Fe 3Co 3Ti 2 lattice leads to the formation of Fe 4Co 2Ti 2, Fe 5CoTi, and Fe 6Ti 2 with significantly improved permanent-magnet properties. A high magnetic anisotropy (13.0 Mergs/cm 3) and saturation magnetic polarizationmore » (11.4 kG) are achieved at 10 K by altering the atomic arrangements and decreasing Fe/Co occupancy disorder.« less